/* 布局相关 */
.fx { display: flex; }
.fx-column { display: flex; flex-direction: column; }

.fx-between { display: flex;justify-content: space-between; }
.fx-start { display: flex;justify-content: flex-start; }
.fx-center { display: flex;justify-content: center; }
.fx-end { display: flex;justify-content: flex-end; }
.fx-around {display: flex; justify-content: space-around; }

.fx-items-start { display: flex;align-items: flex-start; }
.fx-items-center { display: flex;align-items: center; }
.fx-items-end { display: flex;align-items: flex-end; }